HP VB041UT#ABA 90W Docking Station Compatibility: Business Laptop and Tablet PCs: HP EliteBook 8440p Notebook PC HP EliteBook 8440w Mobile Workstation HP ProBook 6440b Notebook PC HP ProBook 6445b Notebook PC HP ProBook 6540b Notebook PC HP ProBook 6545b Notebook PC Ports Spec: Total USB ports: 4 (3 Always-On, 1 Powered) DisplayPort connectors: 1 DVI ports: 1 VGA ports: 1 Audio ports: 2 Parallel ports: 1 Serial ports: 1 PS2 ports: 2 Monitor stand port: 1 LAN: Yes Upgrade bay: No eSATA port: No HP Lock slot: Yes Security tab (d-ring): Yes Dimension: 10.65 x 10.24 x 2.6 Weight: 3.61 lbs. Parts: 1 year limited Labor: 1 year limited Electrical Outlet Plug Type: Office Products